Switzerland’s first sex drive-in, which opened two months ago in a bid to take prostitution off Zurich’s streets, has been a success, the city said Tuesday following an initial evaluation.

“After two months I can say that this guarded prostitution site is working,” Michael Herzig, director of social services for sex workers in the city, told reporters.

Zurich opened the fenced-in site, which is only accessible by car, in an industrial sector on the outskirts of town in August to move sex workers out of the city centre and provide them with a safer working environment.

The drive-in, approved by 52.6 percent of Zurich voters in a March 2012 referendum, has a track where the sex workers can show off their assets and negotiate a price, and nine so-called “sex boxes” where they and their clients can park and conclude the transaction.

The Swiss city of Zurich on Thursday unveiled a sex drive-in which local authorities say will enable them to keep closer tabs on prostitution, a year after voters backed the plan.

Due to be opened officially in a ceremony on August 26, the nine so-called “sex boxes” are located in a former industrial zone in the west of the metropolis, Zurich city hall said in a statement.

The site will be open daily from 7:00 pm to 5:00 am, and only to drivers, who must be alone in their vehicle if they want to pass the gate.

Echoing a fast-food drive-in, they will have to follow a marked route along which up to 40 prostitutes will be stationed. Once they have negotiated a rate, they will drive to one of the nine car-wash style boxes to have sex.

“We cannot solve our problems with the same thinking we used when we created them.” – Albert Einstein.

Attempts to curb the dangers of prostitution in Zurich mean that soon the Swiss City’s council will be operating specially designated “sex boxes” according to The Telegraph:

[These will] provide a discreet location for prostitutes and their clients to conduct business when they open in August next year.

Located in an industrial area of the city, the row of garage-like boxes will have roofs and walls for privacy, and easy access for cars. The council estimates that around 30 prostitutes will meet clients at the site of the boxes, and use the drive-in slots on a first-come-first-served basis.